Vanskaps Thermo Travel Mug in a shape of Canon Macro EF 100mm IS USM Lens with Stainless Steel , Thermo Lens Cup Material: durable non-toxic plastic and stainless steel. Lens Tea Coffee Cup Ef 100mm f/2.8L IS USM is inflexible. The button of Lens Tea Coffee Cup Ef 100mm f/2.8L IS USM can slide. Multi-function: can be as mug and pen holder. 24 month Warranty